CN1024979C - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN1024979C CN1024979C CN90101493A CN90101493A CN1024979C CN 1024979 C CN1024979 C CN 1024979C CN 90101493 A CN90101493 A CN 90101493A CN 90101493 A CN90101493 A CN 90101493A CN 1024979 C CN1024979 C CN 1024979C
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- 239000003990 capacitor Substances 0.000 claims abstract description 65
- 230000010355 oscillation Effects 0.000 claims abstract description 27
- 230000005284 excitation Effects 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 101000983970 Conus catus Alpha-conotoxin CIB Proteins 0.000 description 1
- 101000932768 Conus catus Alpha-conotoxin CIC Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/05—Starting and operating circuit for fluorescent lamp
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- Circuit Arrangements For Discharge Lamps (AREA)
- Dc-Dc Converters (AREA)
- Burglar Alarm Systems (AREA)
- Slot Machines And Peripheral Devices (AREA)
- Design And Manufacture Of Integrated Circuits (AREA)
- Power Conversion In General (AREA)
Abstract
A supply circuit for high-frequency operation of a low-pressure discharge lamp or of several low-pressure discharge lamps connected in parallel is proposed. The power supply circuit comprises a power rectifier followed by an active harmonic oscillation filter and a filter capacitor, and a single-phase high-frequency generator comprising a switching transistor, a switching inductance and an oscillation capacitor, said generator being supplied with power by said filter capacitor and decoupled by means of two diodes.
Description
The present invention relates to a kind of power supply circuits of a low-pressure discharge lamp or several low-pressure discharge lamp high frequencies that is connected in parallel operation usefulness.
Above-mentioned described connected mode is known technology (referring to a German open file 3623749,3611611 and 3700421).These circuits can provide high-frequency current to low-pressure discharge lamp, and can satisfy the legal provisions of existing relevant system power supply, but still need be with a large amount of circuit elements.The on-off action of these known line expection is based on the effect of the push-pull type power-amplifier stage that is connected with three capacitors with at least four diodes.
Main purpose of the present invention provides a kind of power supply circuits of low-pressure discharge lamp high frequency operation usefulness, and this system can put into practice with the circuit element of minimum number.
Above-mentioned purpose is to realize by a kind of power supply circuits of a low-pressure discharge lamp or several low-pressure discharge lamp high frequencies that is connected in parallel operation usefulness.This circuit comprises a power rectifier and a single-phase radio-frequency generator, the power rectifier back is connected with an active harmonic oscillation filter and a filtering capacitor, single-phase radio-frequency generator then comprises a switching transistor, a switched inductors and an oscillating capacitor, described generator is powered by described filtering capacitor, and by means of two diode decouplings.
Because radio-frequency generator system constitutes as the single-phase radio-frequency generator that includes only a switching transistor, a switched inductors, an oscillating capacitor and two diodes, the circuit element that power supply circuits therefore of the present invention use lacks than known power supply circuits.Single-phase radio-frequency generator and active harmonic oscillation filter combine that just can to draw almost be sinusoidal heavy current, can also obtain suitable lamp current and the modulating voltage of handling low-pressure discharge lamp.
A most preferred embodiment of power supply circuits of the present invention is a kind of like this power supply circuits, wherein said active harmonic oscillation filter comprises series connection inductance, an excitation capacitor and two decoupling diodes, thereby supply current is with the clock pulse frequency Sine Modulated of lamp pulse.
Switching transistor switches excitation capacitor at a relative reference potential between series inductance and one of them decoupling diode.Heavy current is modulated with each lamp pulse by the harmonic oscillation filter.In each pulse, an energy that is directly proportional with the corresponding instantaneous value of power supply extracts the back in the connection stage and is fed on the filtering capacitor by a described decoupling diode from power supply.Therefore the harmonic oscillation filter has guaranteed the consumption figure through the heavy current of Sine Modulated.
Another most preferred embodiment of the present invention is a kind of like this power supply circuits, wherein excitation capacitor system is connected respectively to the collector electrode or the drain electrode of switching transistor, and one of them described decoupling diode and switched inductors and another described decoupling diode are connected in parallel, and wherein the increase of voltage is predetermined by switched inductors and the determined resonance characteristic of excitation capacitor on the switching transistor.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, and wherein said single-phase radio-frequency generator moves under switched inductors and the determined resonance frequency of oscillating capacitor.Just drawn a discharge network that opens circuit by diverter switch transistor like this with certain superiority.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, and wherein excitation capacitor is connected in parallel by two decoupling diodes and switched inductors.So just reduce the wave amplitude of negative current half-wave in the discharge lamp, improved the peak factor of lamp current simultaneously.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, and wherein switching transistor is controlled by an electronic control circuit.These power supply circuits just embody other superior characteristic like this.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, and wherein said electronic control circuit constitutes an electronic circuit interface.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, and wherein said electronic control circuit comprises an electro coupled oscillator and a pulse width modulator.The method of this electro coupled oscillator and pulse width modulator available electron starts and stops, and its pulsewidth and/or frequency can be regulated by means of electronic control signal respectively.Various like this user just can use the interface of desired use arbitrarily.
If the capacitance of excitation capacitor is no more than the maximum that is calculated as follows out, can guarantee that then the power consumption that extracts from power supply is on the switching losses of the output of lamp and lamp generator.
Wherein:
P(is total)=power of discharge lamp;
The T(power supply)=frequency of power supply;
The T(lamp)=frequency of lamp current;
The peak value of ū=supply voltage;
ω=frequency
u
0=capacitor C.The direct voltage of (filtering capacitor).Like this, just avoided storing excessive electric energy, thus the unlikely high-voltage value that appearance can not be allowed on filtering capacitor.
Another most preferred embodiment of the present invention is such power supply circuits, and wherein said switched inductors has two other secondary winding, and each secondary winding switches on each heater coil according to modulating voltage by means of a silicon controlled rectifier.This two other secondary winding is in order to heat one or more heater coils of each electrode.So just can be under the good situation of each electrode preheating start-up circuit, and provide corresponding safeguard protection effect, the unlikely invasion and attack that are subjected to overvoltage and overcurrent when for example breaking down of protection discharge lamp.
Another most preferred embodiment of the present invention is so a kind of power supply circuits, wherein when this circuit begins to start at every turn, the switching frequency of single-phase radio-frequency generator increases by means of an electronic control system, drops to specified pulse frequency subsequently in 1/10 second time.The sort circuit structure has been arranged, and the rising situation of heating current when power supply circuits begin to connect at every turn can free be handled.
An alternative embodiment of the invention is so a kind of power supply circuits, overvoltage in the collector electrode of wherein said switching transistor or the drain electrode is via a voltage divider, and the overvoltage of an electronics feed circuit is used for triggering a silicon controlled rectifier via a diac via another described decoupling diode, and described silicon controllable rectifier quits work the starting circuit of described switching transistor and control circuit.Open-circuit line safely in sort circuit.
Another most preferred embodiment of the present invention is so a kind of power supply circuits; wherein for this circuit is carried out overcurrent protection; the emitter current system of switching transistor detects on a resistor as voltage drop; to be fed to corresponding to the signal of described voltage drop then on the control circuit, this control circuit cuts off switching transistor when described voltage drop reaches a predetermined value.
Another most preferred embodiment of power supply circuits according to the present invention, both can detect the voltage of switching transistor collector electrode, can detect the natural voltage of electronic power supply in the analog value again, and just in case just utilize it to ignite a silicon controlled rectifier so that with the starting circuit short circuit may overvoltage occur the time, and the selector switch transistor.So just can safely circuit be cut off.
Potential drop on the resistor impels switching transistor to be cut off when having overcurrent to occur, thereby prevents current overload.The emitter of this resistor and switching transistor is connected in series.
Another most preferred embodiment of the present invention is so a kind of power supply circuits; wherein for this circuit is carried out overcurrent protection; the emitter current system of switching transistor detects as the voltage drop on the resistor; to be fed to corresponding to the signal of described voltage drop then on the control circuit, this control circuit cuts off switching transistor when described voltage drop reaches a predetermined value.The feed voltage of electronic system is available from the supply voltage through rectification by means of a protective resistor; this feed voltage just switches on the electronics feed voltage with silicon controlled rectifier when reaching maximum acceptable threshold, thereby described silicon controlled rectifier can be switched on the electronics feed circuit.In this way, just can finish the initial feed of electronic system, till the feed circuit relevant with clock pulse can replace voltage source with the shortest time.
Another most preferred embodiment of the present invention is so a kind of power supply circuits; wherein under the pulse of each discharge lamp by means of described switched inductors on or a protection another secondary winding on the inductance with an alternating voltage tap, and by a rectifier as the self-supporting power voltage supply of electronics.Another secondary winding system is positioned on switched inductors or the protection inductance, picks out an alternating voltage by this inductance branch.This alternating voltage forms feed voltage after a single-way rectifier rectification.
Referring now to the description of drawings some embodiments of the present invention.Identical parts are got same numbering.
Fig. 1 is the block diagram of the power supply circuits that comprise a harmonic oscillation filter used of low-pressure discharge lamp.
Fig. 2 is the power supply circuit of comprising of making that low-pressure discharge lamp work a uses-heating capacitor and a harmonic oscillation filter.
Fig. 3 is for two power supply circuits that comprise a heating capacitor and a harmonic oscillation filter that the low-pressure discharge lamp work that is connected in parallel is used.
Fig. 4 is the power supply circuit that comprises a heating winding and a harmonic oscillation filter that a low-pressure discharge lamp job is used.
Fig. 5 shows the curve chart of source current and voltage in Fig. 2 power supply circuits.
Fig. 6 shows the harmonic analysis of source current.
Fig. 7 shows the curve chart of lamp current and voltage in Fig. 3 power supply circuits.
Fig. 8 is the block diagram of another embodiment that has the power supply circuits of each switch segments.
Fig. 9 is the power supply circuit with two additional secondary heating windings, and the joint of silicon controlled rectifier is arranged on the heating line chart, also has the overcurrent test section.
Figure 10 be in the sense switch transistor collector and the electronics feed circuit in the power supply circuit used of overvoltage.
Figure 11 produces the power supply circuit that feed voltage is used.
The block diagram of Fig. 1 shows the primary structure of the power supply circuits of low-pressure discharge lamp LL1 high frequency operation usefulness.
These power supply circuits comprise that a high frequency filter 1, a power rectifier 2, have the single-phase radio-frequency generator 7 of a switching transistor T1 and electronic control circuit 6 and a filtering capacitor 4 and the active harmonic oscillation filter 3 that the single-phase radio-frequency generator of a control is used.
Fig. 2 shows the power supply circuit that comprises harmonic oscillation filter 3 that makes low-pressure discharge lamp LL1 work usefulness.High frequency filter 1 is positioned at the input of network, and and then the back is by the dipulse power rectifier 2 that connects of controlled bridge-type not.Single-phase radio-frequency generator by electronic control circuit 6 work comprises a switching transistor T1, a switched inductors L1 and an oscillating capacitor C1.
The E1 of the electrode of discharge lamp LL1, H1 side are connected on switched inductors L1 and the filtering capacitor CO, and opposite side E2, H2 then are connected on the oscillating capacitor C1.The electrode of heater circuit H1 and H2 can be as shown in Figure 2, and C3 couples together by heating capacitor, or separately connect as shown in Figure 4, and each is connected E1-H1 and E2-H2 with a heating winding, and each heats the part winding that winding can be used as switched inductors 1.
During the switching transistor conducting, the single-phase radio-frequency generator of working under high frequency has transmitted the part of discharge lamp positive current half-wave from the positive pole of filtering capacitor CO by oscillating capacitor C1.Switched inductors L1 obtains the energy that a part is directly proportional with the ON time of switching transistor T1 simultaneously.When ending, switching transistor T1 forms an oscillation circuit via discharge lamp, oscillating capacitor C1 and switched inductors L1, this oscillation circuit is originally at the negative current half-wave that produces discharge lamp on the same sense of current in switched inductors L1, then when current reversal in switched inductors by making the remainder of oscillating capacitor C1 discharge generation discharge lamp positive current half-wave.At this moment decoupling diode D6 is not connected filtering capacitor CO with supply voltage.
Power supply circuits also comprise an active harmonic oscillation filter, and this filter comprises series inductance L2, excitation capacitor C2 and decoupling diode D5 and the D6 that is configured on the positive circuit.
The working condition of the active harmonic oscillation filter that is being connected with the single-phase lamp generator that moves under high frequency is described in more detail below.
When switching transistor T1 conducting, by series inductance L2, excitation capacitor C2 is charged to the voltage level of filter CO.Charging current is taken from power supply.So there is portion of energy to be stored among the series inductance L2, this part energy at the end just is discharged among single-phase radio-frequency generator, discharge lamp and the filtering capacitor CO in the excitation capacitor charging.Wherein the energy value of each pulse is directly proportional with the voltage time domain (Voltage time area) of series inductance L2, and the difference that depends on the voltage of supply voltage instantaneous value and excitation capacitor C2, the voltage of capacitor C2 then apply with negative polarity owing to previous disabling pulse.Source current is being modulated into sinusoidal wave form under each lamp pulse under the effect of source current instantaneous value.Series inductance L2 is by the demagnetization process output energy of self.Therefore the voltage of series inductance L2 changes polarity and reaches the magnitude of voltage of the difference of a voltage that equals filtering capacitor CO and each instantaneous value of supply voltage.
When switching transistor T1 ends, under the effect of excitation capacitor C2, enter second stage.Flow through electric current among the switched inductors L1 from switching transistor T1 part as the commutating the current on the excitation capacitor C2 of discharge and amplitude maximum, another part then commutates on oscillating capacitor C1 and the low-pressure discharge lamp, so discharge lamp receives its negative current half-wave.Like this, excitation capacitor has just become the discharge network that ends of switching transistor T1.Change the same soon when therefore the voltage in switching transistor collector electrode and/or the drain electrode can only charge with excitation capacitor C2 respectively, its resonance frequency depends on the inductance value of capacity and the switched inductors L1 of excitation capacitor C2.Because switching transistor T1 goes up the increase again of voltage and has been subjected to this restriction, thereby it has reduced widely by loss.
Negative current half-wave among oscillating capacitor and the low-pressure discharge lamp LL1 is because of reducing as the current segment that reverse current commutates to excitation capacitor C2 from switched inductors L1.So just improve the peak factor of lamp current, and prolonged the useful life of low-pressure discharge lamp.
The electronic control circuit 6 of switching transistor is made up of electro coupled oscillator and pulse width modulator, and the mode of pulse width modulator available electron is started and stopped, and its pulsewidth or frequency can be regulated by electronic control signal.So just can form electrical interface by the selection of different user.
Fig. 3 shows the power supply circuits of two low-pressure discharge lamp LL1 that are connected in parallel and LL2 high frequency operation usefulness.The part that power supply circuits are relevant with low-pressure discharge lamp LL1 comprises decoupling diode D5.1 and D6.1, switched inductors L1.1, oscillating capacitor C1.1 and heating capacitor C3.1.The part that power supply circuits are relevant with low-pressure discharge lamp LL2 comprises decoupling diode D5.2 and D6.2, switched inductors L1.2, oscillating capacitor C1.2 and heating capacitor C3.2.
Fig. 4 shows the modified embodiment of Fig. 2 circuit.In order to heat low-pressure discharge lamp LL1, be equipped with two heating winding segments L3, L4, between the E1 and H1 that one is configured in low-pressure discharge lamp LL1, another is configured between the E2 and H2 of low-pressure discharge lamp lamp LL1.In these power supply circuits, inserting under the situation of low-pressure discharge lamp, current path leads to switching transistor T1 from diode D6 via H1 and E1 terminal, switched inductors L1 and the diode D5 of low-pressure discharge lamp LL1.If low-pressure discharge lamp LL1 is removed from power supply circuits, then path E1-H1 is heating winding institute bridge joint on the one hand, and the energy that is in switched inductors L1 on the other hand again can not be discharged.Therefore, be equipped with another diode D7 as open-circuit-protection, described diode arrangement is being blocked the conducting current paths between switched inductors L1 and filtering capacitor CO.
Fig. 5 to 7 shows the electric current and the voltage curve of the power supply circuits of the actual enforcement of Fig. 2.
Fig. 5 is the oscillogram of the network voltage and the mesh current of Fig. 2 circuit.From current curve I as can be seen, mesh current roughly is sinusoidal wave.When not having the harmonic oscillation filter in the circuit of Fig. 2, electric current can circulate during 1/10 to 1/15 half-wave.This current peak can be brought to network and seriously influence, for this influence should be avoided or limit to the requirement of satisfying rules.The maximum that adds harmonic oscillation filter after-current reduces, and electric current distributes during whole half-wave and come, thereby makes current curve roughly form desired sinusoid.
Fig. 6 shows the harmonic analysis situation of mesh current shown in Figure 5.Wherein the harmonic oscillation of mesh current part is in VDE(Germany The Institution of Electrical Engineers haply) and the IEC(international electronical commission) below the threshold value of allowing.
Fig. 7 shows the lamp current and the modulating voltage of Fig. 2 power supply circuits.From the curve of lamp current and modulating voltage as can be seen, each and every one is having a peak that is superimposed upon on the sine curve on the positive half wave for they.This peak is corresponding to the ON time of transistor T 1.Facts have proved that low-pressure discharge lamp can be worked and the harmful side effect of unlikely generation or therefore shorten its useful life under this electric current and/or this voltage.
The block diagram of Fig. 8 has been represented the structural principle of the another kind of power supply circuits that the operation of low-pressure discharge lamp high frequency is used.Also can see the reference symbol of a-j among Fig. 8 among Fig. 9 to 11, this is for the tie point of the variant part of Fig. 8 circuit is shown.
These power supply circuits comprise high frequency filter 11, power rectifier 12, active harmonic oscillation filter 13, filtering capacitor 14, single-phase high-frequency lamp generator 15, electronic control system 16, exciting circuit 17, overvoltage surveillance 18, starting circuit 19 and electronic power supply device 20.
Fig. 9 shows and has two additional secondary heating winding L 3 and the power supply circuits of L4, and winding L 3 and L4 are transferred on heater coil E1, H1 and E2, the H2 by silicon controlled rectifier Q5 and Q4.The switching of secondary heating winding L 3 and L4 and the service conditions of discharge lamp are irrelevant.Discharge lamp is still unignited or when just having started, can see that work and ignitor supply increase, and the secondary voltage that this voltage can be used as winding L 3 and L4 uses, and as trigger voltage.The trigger point of silicon controlled rectifier Q4 and Q5 is determined by the voltage divider that resistor R 1, R2 and resistor R 3, R4 form.
If control discharge lamp, then can not reach trigger voltage, thereby its heating part always can not connected with rated operational voltage.When the operating voltage of discharge lamp increases, just reach trigger voltage, so the heating part of coil is just connected automatically.When disconnecting heater coil or making its interruption of work, diode D2 and D3 just work the high current capacity that prevents that appearance can not be allowed on the voltage divider resistance.
The switching frequency that improves single-phase high-frequency lamp generator can further improve starting characteristic, because each switch periods all provides the heating current pulse.When adding the electronics feed voltage for the first time on electronic control circuit 16, circuit all can make frequency increase at every turn.
Fig. 9 show can by with resistor R0 that the emitter of switching transistor T1 is connected on voltage drop come overvoltage on sense switch transistor T 1 emitter.When electric current reached given threshold value, corresponding potential drop acted on the electronic control circuit 16, thereby exciting circuit 17 is disconnected, thereby switching transistor T1 is also ended.So these power supply circuits just play the electronics overvoltage protection.
Figure 10 shows the circuit part of power supply circuits detection of excessive current.The collector voltage of switching transistor T1 is transferred on the diac Q1 via the voltage divider that resistor R 5, R6 and diode D15 form.Adopting logical "or" to connect also can depend on the level of electronics feed voltage by diode 17 diac Q1 to be transferred.Capacitor C3 prevents the voltage peak that the circuits for triggering response short time occurs, and transmits the needed ignition current of silicon controlled rectifier Q2 when diac Q1 conducting connects.If silicon controlled rectifier Q2 system ignites by means of trigger impulse, then circuit is just by resistor R 7 self-insurances.
Simultaneously this output that makes electronic control circuit 16 via the output of diode D17 and starting circuit 19 via diode D18 short circuit.So single-phase high-frequency lamp generator disconnects.Have only after power supply circuits break away from power supply, after promptly the self-insurance electric current of silicon controlled rectifier Q2 stopped, discharge lamp just can restart.
Figure 11 shows the starting circuit 19 of power supply circuits and the circuit part of electronics feed circuit 20.When connecting network voltage, capacitor C14 is just via resistor R 10 and diode D20 charging at every turn.The maximum voltage value of capacitor C14 is provided by the voltage divider that resistor R 8, R9 form, and silicon controlled rectifier Q3 promptly is being transferred to described voltage on the electronics feed circuit under this maximum voltage value.
So block principle according to oscillator-transducer, single-phase high-frequency lamp generator is with regard to starting oscillation and carry out electronics feed (self-sufficiency) via magnetic coupling coil L1-L5 and/or L6-L5 respectively.Voltage stabilizing by means of one the series connection resistor in the simplest mode at square frame 20(Fig. 8) in carry out.
Claims (13)
1, a kind of power supply circuits of a low-pressure discharge lamp or several low-pressure discharge lamp high frequencies that is connected in parallel operation usefulness is characterized in that described power supply circuits comprise:
-power rectifier is connected with an active harmonic oscillation filter and a filtering capacitor in an one output back; Described active harmonic oscillation filter comprises a series inductance, an excitation capacitor and two decoupling diodes,
-single-phase radio-frequency generator comprises a switching transistor, a switched inductors and an oscillating capacitor; One end of described radio-frequency generator is connected with described active harmonic oscillation filter, and the other end is connected with another output of described power rectifier and the node of described filtering capacitor,
-described radio-frequency generator is powered by described filtering capacitor, and breaks away from power supply (decoupling) by means of two diodes of described active harmonic oscillation filter.
2, power supply circuits as claimed in claim 1, it is characterized in that, described excitation capacitor is to be connected respectively on the collector electrode or drain electrode of switching transistor, and one of them described decoupling diode and switched inductors and another described decoupling diode are connected in parallel, and wherein the increase of switching transistor voltage is predetermined by switched inductors and the determined resonance characteristic of excitation capacitor.
3, power supply circuits as claimed in claim 1 is characterized in that, described single-phase radio-frequency generator is worked under switched inductors and the determined resonance frequency of oscillating capacitor.
4, power supply circuits as claimed in claim 1 or 2 is characterized in that, described excitation capacitor is connected in parallel by two decoupling diodes and switched inductors.
5, power supply circuits as claimed in claim 1 is characterized in that, switching transistor is controlled by electronic control circuit.
6, power supply circuits as claimed in claim 5 is characterized in that, described electronic control circuit constitutes an electrical interface.
7, power supply circuits as claimed in claim 6 is characterized in that, described electronic control circuit comprises an electro coupled oscillator and a pulse width modulator.
8, power supply circuits as claimed in claim 1 is characterized in that, described switched inductors has two additional secondary winding, and each winding is transferred on the corresponding heater coil according to modulating voltage by means of a silicon controlled rectifier.
9, power supply circuits as claimed in claim 1, it is characterized in that, by means of electronic control system, the switching frequency of single-phase radio-frequency generator is increased, in 1/10 second time, constantly be reduced to specified pulse frequency subsequently.
10, power supply circuits as claimed in claim 1, it is characterized in that, overvoltage in described switching transistor collector electrode or the drain electrode is via a voltage divider and a described decoupling diode, and electronics loses the overvoltage of circuit via another described decoupling diode, be used to via a diac, trigger a silicon controlled rectifier, described silicon controlled rectifier quits work the starting circuit of described switching transistor and control circuit.
11, power supply circuits as claimed in claim 1; it is characterized in that; for power supply circuits are carried out overcurrent protection; the emitter current system of switching transistor is detected as a resistor pressure drop; and will be fed to control circuit corresponding to the signal of described pressure drop; when described pressure drop reaches predetermined value, switching transistor is ended.
12, power supply circuits as claimed in claim 1 is characterized in that, when adding power supply voltage, via a resistor and a diode, initial feed voltage accumulate formation on a capacitor, reach the threshold voltage of maximum after, this voltage is transferred on the electronics feed circuit by a silicon controlling rectifier.
13, power supply circuits as claimed in claim 1 is characterized in that, discharge lamp is pulse each time, described switched inductors or once protection another secondary burning group on the inductance with an alternating voltage tap, and provide as electronics self-sufficiency voltage by a rectifier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP89104702 | 1989-03-16 | ||
| EP89104702.9 | 1989-03-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1045677A CN1045677A (en) | 1990-09-26 |
| CN1024979C true CN1024979C (en) | 1994-06-08 |
Family
ID=8201092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90101493A Expired - Fee Related CN1024979C (en) | 1989-03-16 | 1990-03-16 | Power supply circuit |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5070276A (en) |
| EP (1) | EP0389847B1 (en) |
| JP (1) | JPH03173347A (en) |
| KR (1) | KR900015582A (en) |
| CN (1) | CN1024979C (en) |
| AT (1) | ATE118666T1 (en) |
| CA (1) | CA2012441A1 (en) |
| DE (1) | DE59008453D1 (en) |
| ES (1) | ES2068266T3 (en) |
| IN (1) | IN171097B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4217822A1 (en) * | 1991-10-18 | 1993-04-22 | Heinrich Korte | Switching circuit for HF low pressure discharge lamp - uses series oscillator resonated at characteristic frequency for lamp ignition |
| TW339496B (en) * | 1994-06-22 | 1998-09-01 | Philips Electronics Nv | Method and circuit arrangement for operating a high-pressure discharge lamp |
| FI96734C (en) | 1994-11-22 | 1996-08-12 | Helvar Oy | Interference filter for a discharge lamp's electronic connection device |
| US5682086A (en) * | 1995-10-05 | 1997-10-28 | Yin Nan Enterprises Co., Ltd. | Dynamic filter for an electronic ballast with a parallel-load resonant inverter |
| US6137234A (en) * | 1999-10-18 | 2000-10-24 | U.S. Philips Corporation | Circuit arrangement |
| US6396220B1 (en) * | 2001-05-07 | 2002-05-28 | Koninklijke Philips Electronics N.V. | Lamp ignition with compensation for parasitic loading capacitance |
| WO2007004114A1 (en) * | 2005-06-30 | 2007-01-11 | Koninklijke Philips Electronics N.V. | Method for driving a high-pressure gas discharge lamp of a projector system |
| ES2656366T3 (en) * | 2011-05-12 | 2018-02-26 | Moog Unna Gmbh | Emergency power supply device and method to supply emergency power |
| CN111243825B (en) * | 2018-11-29 | 2023-06-16 | 阿尔贝特·莫伊雷尔 | Device for demagnetizing ferromagnetic material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0059064B1 (en) * | 1981-02-21 | 1985-10-02 | THORN EMI plc | Lamp driver circuits |
| JPS59128128A (en) * | 1983-01-13 | 1984-07-24 | Matsushita Electric Works Ltd | Loading method |
| DE3303374A1 (en) * | 1983-02-02 | 1984-08-02 | Rheintechnik Weiland & Kaspar Kg, 6680 Neunkirchen | Power supply circuit for fluorescent tubes |
| DE3312572A1 (en) * | 1983-04-08 | 1984-10-18 | Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg | Electronic ballast for a fluorescent lamp |
| SE444496B (en) * | 1984-08-02 | 1986-04-14 | Innocap Ab | CLUTCH DEVICE FOR GAS EMISSION POWER DRIVING |
| US4873471A (en) * | 1986-03-28 | 1989-10-10 | Thomas Industries Inc. | High frequency ballast for gaseous discharge lamps |
| DE3611611A1 (en) * | 1986-04-07 | 1987-10-08 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR HIGH-FREQUENCY OPERATION OF A LOW-PRESSURE DISCHARGE LAMP |
| DE3623749A1 (en) * | 1986-07-14 | 1988-01-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR OPERATING LOW-PRESSURE DISCHARGE LAMPS |
| DE3700421A1 (en) * | 1987-01-08 | 1988-07-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR OPERATING A LOW-PRESSURE DISCHARGE LAMP |
| US4904903A (en) * | 1988-04-05 | 1990-02-27 | Innovative Controls, Inc. | Ballast for high intensity discharge lamps |
-
1989
- 1989-05-24 IN IN400/CAL/89A patent/IN171097B/en unknown
-
1990
- 1990-03-09 DE DE59008453T patent/DE59008453D1/en not_active Expired - Fee Related
- 1990-03-09 ES ES90104513T patent/ES2068266T3/en not_active Expired - Lifetime
- 1990-03-09 EP EP90104513A patent/EP0389847B1/en not_active Expired - Lifetime
- 1990-03-09 AT AT90104513T patent/ATE118666T1/en not_active IP Right Cessation
- 1990-03-13 US US07/492,457 patent/US5070276A/en not_active Expired - Fee Related
- 1990-03-16 KR KR1019900003678A patent/KR900015582A/en not_active Application Discontinuation
- 1990-03-16 JP JP2064478A patent/JPH03173347A/en active Pending
- 1990-03-16 CN CN90101493A patent/CN1024979C/en not_active Expired - Fee Related
- 1990-03-16 CA CA002012441A patent/CA2012441A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CN1045677A (en) | 1990-09-26 |
| JPH03173347A (en) | 1991-07-26 |
| CA2012441A1 (en) | 1990-09-16 |
| EP0389847A3 (en) | 1992-03-04 |
| ATE118666T1 (en) | 1995-03-15 |
| EP0389847A2 (en) | 1990-10-03 |
| KR900015582A (en) | 1990-10-27 |
| ES2068266T3 (en) | 1995-04-16 |
| DE59008453D1 (en) | 1995-03-23 |
| IN171097B (en) | 1992-07-18 |
| EP0389847B1 (en) | 1995-02-15 |
| US5070276A (en) | 1991-12-03 |
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| C14 | Grant of patent or utility model | ||
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